Fastening device



FIG. 1 is a perspective view of a fastening device showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a left side elevational view thereof; and

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is an environmental right side view of the fastening device shown in a state of use.

The evenly spaced broken lines depict portions of the fastening device that form no part of the claimed design. The dot-dash-dot broken lines define the bounds of the claimed design and form no part thereof. The dot-dot-dash broken lines, rendered in FIG. 8 , illustrates the environment of the claimed design and forms no part thereof. 

CLAIM The ornamental design for a fastening device, as shown and described. 